Speaker 1: Welcome to brain Stuff from how Stuff Works dot com
Speaker 1: where smart Happens. Hi, I'm Marshall Brain with today's question,
Speaker 1: what is a snow dragon and how does it eat
Speaker 1: and digest so much snow? The northern cities of the
Speaker 1: United States have experienced a lot of snow this winter,
Speaker 1: a lot of snow, many feet of snow. If you've
Speaker 1: been to Chicago or New York City, you've seen the snow.
Speaker 1: They have a problem because you can only plow so
Speaker 1: much snow before it creates giant snow walls and giant
Speaker 1: snow canyons on the streets of a big city. So,
Speaker 1: for example, if you're in New York City and you're
Speaker 1: a city manager and you need to get rid of
Speaker 1: snow on the street, you can plow it to the
Speaker 1: side only so much because there are part cars on
Speaker 1: the side. And then there's the sidewalk. And if you've
Speaker 1: been to New York City in the evening, you know
Speaker 1: that the sidewalk is important not only for pedestrians, but
Speaker 1: because that's where people put their trash for trash pickup.
Speaker 1: If you pile the sidewalks up with ten ft of
Speaker 1: snow from the streets, then you cut off all pedestrian
Speaker 1: access and you make it impossible to pick up garbage,
Speaker 1: and you have a mess. So you have to do
Speaker 1: something else with the snow. And in the past there
Speaker 1: have only been two options. You can either pick it
Speaker 1: up with front end loaders and dump it into parking
Speaker 1: lots or vacant lots or city parks or someplace like that.
Speaker 1: You pile it up in huge mountains, or you can
Speaker 1: take a front end loader and dump the snow into
Speaker 1: dump trucks and truck it out of the city. Within
Speaker 1: the last few years, a new tool has become available
Speaker 1: to big cities that are experiencing way too much snow.
Speaker 1: It's called the snow Dragon, and it gives city managers
Speaker 1: another option. A snow dragon and machines like it from
Speaker 1: other manufacturers are giant and snow melting machines that will
Speaker 1: melt snow on the spot. If you've ever seen a
Speaker 1: snow dragon, you know that it's a fairly simple device.
Speaker 1: It's form is a big trailer that you would pull
Speaker 1: behind a truck, and part of the trailer is a
Speaker 1: large diesel engine and a large diesel burner, and the
Speaker 1: other part of the trailer is a huge tank into
Speaker 1: which front end loaders can dump snow. So in operation
Speaker 1: you have front end loaders pulling up and dumping snow
Speaker 1: into the tank. And in that tank there's a large
Speaker 1: quantity of water, you know, maybe ten thousand gallons of
Speaker 1: water or something like that. That water is being pumped
Speaker 1: by a diesel powered pump through a heating unit, a
Speaker 1: diesel powered heating unit to get warmed up, so it's
Speaker 1: pumped out of the tank through the heater back into
Speaker 1: the tank through spray nozzles, and this gives a snow
Speaker 1: dragon a way to melt snow very very quickly, because
Speaker 1: hot running water is the enemy of snow, so as
Speaker 1: snow goes in, it gets turned into water, and as
Speaker 1: more snow gets in, the water overflows out of pipe
Speaker 1: and it's then just run into the normal sewer system
Speaker 1: or the street drainage system of the city. Snow dragons
Speaker 1: and the machines like it are not cheap. They cost
Speaker 1: about a quarter of a million dollars each, and they're
Speaker 1: fairly expensive to operate. They cost about three hundred dollars
Speaker 1: an hour to operate because they're burning forty or fifty
Speaker 1: gallons of diesel fuel per hour to generate the heat
Speaker 1: that's needed to melt the snow. But the advantages They
Speaker 1: can process something like thirty tons of snow per hour,
Speaker 1: which is a huge quantity of snow, and you have
Speaker 1: to compare that cost to the cost of trucking. So
Speaker 1: if you were loading that snow into dump trucks and
Speaker 1: hauling it for miles outside the city, that would have
Speaker 1: a cost for the dump trucks and for the fuel
Speaker 1: to fuel those dump trucks. So by comparison, a snow
Speaker 1: dragon actually starts to look fairly reasonably priced, probably even
Speaker 1: lower costs than a large scale dump truck operation. The
Speaker 1: next time you're in a big city and there's a
Speaker 1: bunch of snow, keep an eye out for front end
Speaker 1: loaders that are moving the snow around. Generally speaking, they'll
Speaker 1: either be moving it into a parking lot or into
Speaker 1: a dump truck, or they'll be loading it into one
Speaker 1: of these new snow dragon machines. Be sure to check
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Speaker 1: and perplexing possibilities of tomorrow. The House Stuff Works I
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